m42 bogging out?! no vacuum leaks

[grantlacey11]

un plug the black and white wire

oh my god yes. caused me months of pointless pain!!!

[bloodshot-e30]

mine used to do this but started missing under load and idle would drop..
i changed plugs and that helped a lot!

also might try the MAF

[spiDmang]

nice, lemme know! i just temporarily taped up the cracked areas until i can get my hoses in. but i still have a huge crack where the valve cover hose extends underneath the manifold....shits annoying!

[///digitalme]

Yes I can take a picture just added a hose to hook it up it goes under the throttle body and the icv goes in the boot! It should idle better!

[spiDmang]

My fuel pump was bad check it didn't have compression at times. And the computer didn't give me a code It kept on throwing 1221 which is vaccum, afm, etc
I say re route the hoses clean your icv and see how it does

can you take a clearer pic of how you re routed your vac hoses??

im assuming your talking about the hose that goes from the top of the valve cover, to underneath the intake??

[spiDmang]

My fuel pump was bad check it didn't have compression at times. And the computer didn't give me a code It kept on throwing 1221 which is vaccum, afm, etc
I say re route the hoses clean your icv and see how it does

well the comp is giving me 1444 which is no code, so maybe ill check the fuel pump!

thanks for all the help!

[///digitalme]

My fuel pump was bad check it didn't have compression at times. And the computer didn't give me a code It kept on throwing 1221 which is vaccum, afm, etc
I say re route the hoses clean your icv and see how it does

[spiDmang]

if fuel pump was bad, wouldnt the cel shoot me a code??
imma clean the ICV tomorrow and check the hoses.

hopefully it isnt something major...i wanna start upgrading my suspension! lol

[///digitalme]

same issues that i had! on the freeway it died and same symptons if i would let the rpms drop to 2k it wouldnt accelerate and it would start to choke, check your fuel pump!, clean your icv, and re-route the hoses like i did! a temporary fix to check for vaccum leaks most likely is coming from this


this is the fuel pump i took out of my car...
it looks sketchy!

[Dj Buttchug]

un plug the black and white wire

[bmwm42]

Idle control valve

[spiDmang]

TPS? Try popping in a good working ECU also.

im sorry, im a noob when it comes to the m42...two past e30s were m20s.

TPS means throttle position sensor correct?
what about the ICV??

[KenC]

TPS? Try popping in a good working ECU also.

[spiDmang]

Hey guys,

So i recently purchased a 91 318i. The car has 236k but has been very well taken care of.

But to get to the point, the car started having very bad bogging issues lately. Its not sending a CEL code (1444....no fault) and i checked if there were any vacuum leaks with some carb cleaner, and i havent found the culprit to what is causing my m42 to run so shitty!!
The car will lose power and eventually die if the rpms arent kept above 2k (when im driving). if im at a stop, it idles fine. driving is when my car loses power.

any ideas??! the "mess under the intake" mod hasnt been done yet either...

Any help would be much appreciated!